ECU Schematic
 

Does anyone have a complete schematic for the ECU?


Trying to nail down an electronic issue.


Thanks

Re: ECU Schematic
 

Since there hasn't been any response, I'll guess no one has an ECU schematic.

Re: ECU Schematic
 

What is the " electronic issue" you are chasing?

Re: ECU Schematic
 

Intermittent code 42. I've replaced everything in that circuit, but the problem continues.

Re: ECU Schematic
 

Did you see this?

http://zr1.net/forum/showthread.php?t=17291

Might help

Re: ECU Schematic
 

Did you recently pull the plenum?

http://www.zr1.net/forum/showthread.php?t=31249

I thought the ecm wiring is located in the shop manual.

Re: ECU Schematic
 

Wiring yes, I assumed he wanted an internal schematic for the ECM..

Re: ECU Schematic
 

I posted that thread. With the code 42 being intermittent there is a possibility that a DIS pin may not be totally bent but rather misaligned enough to miss going through the center of its respective connector and pass between the connector and the connector housing. The other possibility is a pin connector that has been enlarged, so that the pin goes through it but the electrical connection between them is not good. The OP may want to check the main DIS connector for these issues. I seem to recall someone on the forum had the latter condition with a similar intermittent problem. The code that is generated will depend on which pin is affected.
H
:icon_sant

Re: ECU Schematic
 

Plenum pull will be the next step.
This problem first showed up sometime after my last plenum pull just before Carlisle.
Code 42 started showing up a month after the Carlisle trip.
Sometimes to won't set for a few days. Other times it sets several times a day. No real pattern.
All cables checked, knock sensor and O2's replaced.
Code shows with both stock chip and Mark's chip.
Last things left are DIS module (I have a spare) or ECU (no spare - reason for needing internal schematic).